SCIE A ONGLET MOTORISEE

MOTORIZED MITER BOX

Abrégé anglais

A motorized miter box or saw comprising a
cuttinghead handle for guiding the movement of the saw
between a raised, rest position and a lowered, operational
position. The cuttinghead handle is adjustably coupled to
the cuttinghead so that the orientation of the cuttinghead
handle with respect to a user of the saw can be adjusted
by the user between a first position and a second
position. The first position has a preferred orientation
for the user when the saw is located on a floor or at a
similar elevation and the user is kneeling or similarly
located at floor level. The second position has a
preferred orientation for the user when the saw is located
on a bench or similar elevated structure and the user is
standing or similarly located in front of the saw.
The disclosed motorized miter box also comprises
a carrying handle for use by a user in carrying the miter
box between work sites. The carrying handle protrudes
from the rear of the miter box base. The carrying handle
comprises a support surface located in the same geometric
plane as the lower surface of the base so that the
carrying handle helps prevent the miter box saw from
tipping backwards if the cuttinghead apparatus is allowed
to move freely from its lowered, operational position to
its upper, at rest position.

Revendications

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WHAT IS CLAIMED IS:


1. A motorized miter box, comprising:
(a) a base;
(b) a turntable rotatably supported by the base;
(c) a fence disposed above the base for supporting
the orientation of a workpiece located on the
base;
(d) a support coupled to the turntable at a rear
portion of the turntable;
(e) cuttinghead means for cutting the workpiece, the
cuttinghead means being pivotally coupled to the
support for positioning a motor driven saw
between a raised, rest position and a lowered,
operational position; and
(f) cuttinghead handle means comprising a cuttinghead
handle for guiding the movement of the saw
between the raised, rest position and the
lowered, operational position, the cuttinghead
handle being adjustably coupled to the
cuttinghead means so that the orientation of the
cuttinghead handle with respect to a user of the
saw can be adjusted by the user between a first
position and a second position, the first
position having a preferred orientation for the
user when the miter box is located on a floor or
at a similar elevation and the user is kneeling
or similarly located at floor level, the second
position having a preferred orientation for the
user when the saw is located on a bench or
similar elevated structure and the user is
standing or similarly located in front of the
saw.
2. The miter box of claim 1 wherein the cuttinghead
handle means comprises means for adjusting the


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cuttinghead handle in a plurality of positions between
the first and second positions.
3. The miter box of claim 1 wherein the cuttinghead
handle means comprises means for adjusting the
cuttinghead handle in an infinite number of positions
between the first and second positions.
4. The miter box of claim 3 wherein the means for
adjusting the cuttinghead handle in an infinite number
of positions between the first and second positions
comprises a bracket located between the cuttinghead
handle and the cuttinghead means, the bracket defining
an elongated adjustment slot through which adjustably
secured fasteners hold the bracket between the
cuttinghead handle and the cuttinghead means, the slot
being oriented so that, when the adjustably secured
fasteners are loosened, the cuttinghead handle can be
adjusted to an infinite number of positions between
the first and second positions and so that, when the
adjustably secured fasteners are tightened, the
cuttinghead handle is fixed in a position selected by
the user.
5. The miter box saw of claim 4 wherein bracket defines
a plurality of elongated adjustment slots through
which adjustably secured fasteners hold the bracket
between the cuttinghead handle and the cuttinghead
means, the slots being oriented so that, when the
adjustably secured fasteners are loosened, the
cuttinghead handle can be adjusted to an infinite
number of positions between the first and second
positions and so that, when the adjustably secured
fasteners are tightened, the cuttinghead handle is
fixed in a position selected by the user.



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6. The miter box saw of claim 4 wherein bracket defines
two elongated adjustment slots through which
adjustably secured fasteners hold the bracket between
the cuttinghead handle and the cuttinghead means, the
slots being oriented so that, when the adjustably
secured fasteners are loosened, the cuttinghead handle
can be adjusted to an infinite number of positions
between the first and second positions and so that,
when the adjustably secured fasteners are tightened,
the cuttinghead handle is fixed in a position selected
by the user.
7. A motorized miter box, comprising:
(a) a base having a lower surface for supporting the
base on a work surface;
(b) a turntable rotatably supported by the base;
(c) a fence disposed above the base for supporting
the orientation of a workpiece located on the
base;
(d) a support coupled to the turntable at a rear
portion of the turntable;
(e) cuttinghead means for cutting the workpiece, the
cuttinghead means being pivotally coupled to the
support for positioning a motor driven saw
between a raised, rest position and a lowered,
operational position, the cuttinghead means
comprising biasing means for biasing the motor
driven saw to the raised, rest position;
(f) cuttinghead handle means comprising a
cuttinghead handle for guiding the movement
of the saw between the raised, rest position
and the lowered, operational position; and
(g) carrying handle means comprising a carrying
handle for use by a user in carrying the miter
box between work sites, the carrying handle
protruding form the rear of the base, the
carrying handle comprising a support surface




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located in the same geometric plane as the lower
surface of the base so that the carrying handle
helps prevent the miter box saw from tipping
backwards if the cutting head means is allowed to
move freely from its lowered, operational
position to its upper, at rest position.
8. The miter box of claim 7 wherein the carrying handle
means comprises means for adjusting the lateral
position of the carrying handle between a storage
position in which the most rearward portion of the
carrying handle is located in relatively close
proximity to the base and a second carrying and
anti-tipping position in which the most rearward portion of
the carrying handle is located relatively further away
from the base.
9. The power miter box of claim 7 wherein the means for
adjusting the lateral position of the carrying handle
comprises means for adjusting the position of the
carrying handle in a plurality of.positions between a
storage position in which the most rearward portion of
the carrying handle is located in relatively close
proximity to the base and a second carrying and
anti-tipping position in which the most rearward portion of
the carrying handle is located relatively further away
from the base.
10. The power miter box of claim 9 wherein the means foo
adjusting the lateral position of the carrying handle
comprises means for adjusting the position of the
carrying handle in an infinite number of positions
between a storage position in which the most rearward
portion of the carrying handle is located in
relatively close proximity to the base and a second
carrying and anti-tipping position in which the most



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rearward portion of the carrying handle is located
relatively further away from the base.
11. A motorized miter box, comprising:
(a) a base having a lower surface for supporting the
base on a work surface;
(b) a turntable rotatably supported by the base;
(c) a fence disposed above the base for supporting
the orientation of a workpiece located on the
base;
(d) a support coupled to the turntable at a rear
portion of the turntable;
(e) cuttinghead means for cutting the workpiece, the
cuttinghead means being pivotally coupled to the
support for positioning a motor driven saw
between a raised, rest position and a lowered,
operational position;
(f) cuttinghead handle means comprising a cuttinghead
handle for guiding the movement of the saw
between the raised, rest position and the
lowered, operational position, the cuttinghead
handle being adjustably coupled to the
cuttinghead means so that the orientation of the
cuttinghead handle with respect to a user of the
saw can be adjusted by the user between a first
position and a second position, the first
position having a preferred orientation for the
user when the miter box is located on a floor or
at a similar elevation and the user is kneeling
or similarly located at floor level, the second
position having a preferred orientation for the
user when the saw is located on a bench or
similar elevated structure and the user is
standing or similarly located in front of the
saw; and
(g) carrying handle means comprising a carrying
handle for use by a user in carrying the miter



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box between work sites, the carrying handle
protruding form the rear of the base, the
carrying handle comprising a support surface
located in the same geometric plane as the lower
surface of the base so that the carrying handle
helps prevent the miter box saw from tipping
backwards if the cuttinghead means is allowed to
move freely from its lowered, carrying and
anti-tipping position to its upper, at rest position.
12. The miter box of claim 11 wherein the cuttinghead
handle means comprises means for adjusting the
cuttinghead handle in a plurality of positions between
the first and second positions.
13. The miter box of claim 11 wherein the cuttinghead
handle means comprises means for adjusting the
cuttinghead handle in an infinite number of positions
between the first and second positions.
14. The miter box of claim 13 wherein the means for
adjusting the cuttinghead handle in an infinite number
of positions between the first and second positions
comprises a bracket located between the cuttinghead
handle and the cuttinghead means, the bracket defining
an elongated adjustment slot through which adjustably
secured fasteners hold the bracket between the
cuttinghead handle and the cuttinghead means, the slot
being oriented so that, when the adjustably secured
fasteners are loosened, the cuttinghead handle can be
adjusted to an infinite number of positions between
the first and second positions and so that, when the
adjustably secured fasteners are tightened, the
cuttinghead handle is fixed in a position selected by
the user.



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15. The miter box saw of claim 13 wherein bracket defines
a plurality of elongated adjustment slots through
which adjustably secured fasteners hold the bracket
between the cuttinghead handle and the cuttinghead
means, the slots being oriented so that, when the
adjustably secured fasteners are loosened, the
cuttinghead handle can be adjusted to an infinite
number of positions between the first and second
positions and so that, when the adjustably secured
fasteners are tightened, the cuttinghead handle is
fixed in a position selected by the user.
16. The miter box saw of claim 13 wherein bracket defines
two elongated adjustment slots through which
adjustably secured fasteners hold the bracket between
the cuttinghead handle and the cuttinghead means, the
slots being oriented so that, when the adjustably
secured fasteners are loosened, the cuttinghead handle
can be adjusted to an infinite number of positions
between the first and second positions and so that,
when the adjustably secured fasteners are tightened,
the cuttinghead handle is fixed in a position selected
by the user.
17. The miter box of claim 11 wherein the carrying handle
means comprises means for adjusting the lateral
position of the carrying handle between a storage
position in which the most rearward portion of the
carrying handle is located in relatively close
proximity to the base and a second carrying and
anti-tipping position in which the carrying handle is
located relatively further away from the base.
18. The power miter box of claim 17 wherein the means for
adjusting the lateral position of the carrying handle
comprises means for adjusting the position of the
carrying handle in a plurality of positions between a



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storage position in which the most rearward portion of
the carrying handle is located in relatively close
proximity to the base and a second carrying and
anti-tipping position in which the carrying handle is
located relatively further away from the base.
19. The power miter box of claim 17 Wherein the means for
adjusting the lateral position of the carrying handle
comprises means fox adjusting the position of the
carrying handle in an infinite number of positions
between a storage position in which the most rearward
portion of the carrying handle is located in
relatively close proximity to the base and a second
carrying and anti-tipping position in which the
carrying handle is located relatively further away
from the base.

Description

MOTORIZED MITER ROR
Backqround and Summary of the Invention
The present application relates to motorized
miter boxes or the like anti, more particularly, to
improvements in the handles for such saws.
The handle improvements are embodied in a
motorized miter box comprising a base having a lower
surface for supporting the base on a work surface. A
turntable is rotatably supported by the base, and a fence
is disposed above the worktable for supporting the
orientation of a workpiece located on the base. A
support is coupled to the turntable at a rear portion of
the turntable.
The motorized miter box disclosed also includes
cuttinghead apparatus for cutting the workpiece. The
cuttinghead apparatus is pivotally coupled to the support
for positioning a motor driven saw between a raised, rest
position and a lowered, operational position. The
cuttinghead apparatus comprises biasing apparatus for
biasing the motor driven saw to the raised, rest position.
The cuttinghead handle comprises a cuttinghead
handle for guiding the movement of the saw between the
raised, rest position and the lowered, operational
position. The cuttinghead handle is adjustably coupled to
the cuttinghead apparatus so that the orientation of the
cuttinghead handle with respect to a user of the saw can
be adjusted by the user between a first position and a
second position. The first position has a preferred
orientation for the user when the saw is located on a
floor or at a similar elevation and the user is kneeling
or similarly located at floor level. The second position
has a preferred orientation for the user when the saw is
located on a bench or similar elevated structure and the
user is standing or similarly located in front of the saw.
The carrying handle comprises a carrying handle
for use by a user in carrying the miter box between work
sites. The carrying handle protrudes from the rear of the


2
base. The carrying handle comprises a support surface
located in the same geometric plane as the lower surface
of the base so that the carrying handle helps prevent the
miter box from tipping backwards if the cuttinghead
apparatus is allowed to move freely from its lowered,
operational position -to its upper, at rest position.
Brief Description of the Drawings
Figure 1 illustrates a top, front and right side
perspective of a motorized miter box.
Figure 2 illustrates a top, plan view of a
motorized miter box.
Figure 3 illustrates a bottom plan view of a
motorized miter box.
Figure 4 illustrates a left side elevational view
of a motorized miter box.
Figures 5 and 6 illustrate right side elevational
views of a motorized miter box. In Figure 5, the
cuttinghead handle is shown in a first position having a
preferred orientation for the user when the saw is located
on a floor or at a similar elevation and the user is
kneeling or similarly located at floor level. Figure 6
illustrates the cuttinghead handle in a second position
having a preferred orientation for the user when the saw
is located on a bench or similar elevated structure and
the user is standing or similarly located in front of the
saw.
Description of the Preferred Embodiment
The motorized miter box illustrated in the
drawings comprises a base 10 having a lower surface 12 for
supporting the base on a work surface. A turntable 14 is
rotatably supported by base 12. A fence 16 is disposed
above base 10 for supporting the orientation of a
workpiece located on the base. A support 18 is coupled by
conventional means to turntable 14 at a rear portion of
the turntable.



~os~~~
3
The miter box shown further comprises cuttinghead
apparatus for cutting the workpiece. The cuttinghead
apparatus may comprise an arm 20 coupled to support l8,by
a pivot bolt 22 for positioning a motor driven saw 24
between a raised, rest position and a lowered, operational
position.
In the embodiment disclosed, a motor 26 drives
saw 24 through a drive belt and pulley system enclosed in
part by belt housing 28. In -the preferred embodiment,
motor 26 is a 22,000 rpm universal type motor, and the
pulleys are sized to run the blade at a no-load speed of
approximately 6000 rpm. The drive belt (not shown) may
comprise a poly v-belt. Saw 24 is energized by depressing
switch trigger 32 and stopped by releasing switch trigger
32, which is electrically coupled to motor 26. The
cuttinghead apparatus comprises a biasing spring 30 for
biasing motor driven saw 24 to the raised, rest position.
In its preferred configuration, the miter box
will cut any angle from a straight 90 degree cut to 47
degrees right and left. To adjust the angle of cut, lock
handle 34 is loosened and plunger trigger 36 is pulled
upward, enabling the turntable to be set at any angle by
tightening lock handle 34. The miter box shown is
equipped with positive stops 38 at the zero, 22 1/2, and
45 degrees right and left positions. In order to employ
these positive stops, lock handle 34 is loosened and moved
either right or left as desired until plunger trigger 36
engages into one of the positive stops. A pointer 40 and
scale 42 (numbers not shown) are used to locate angles of
cut in between positive stops 38.
Saw 24 is protected by both a fixed-position
upper blade guard 45 and a movable lower blade guard 44.
When a cut is made in stock, lower blade guard 44
automatically moves upward in order to expose blade 24 to
the stock. Lower blade guard 44 rotates about pivot 46
located on a pivot plate 47 mounted to upper blade guard
45. Lower blade guard 44 is activated by linkage bars 48



4
coupled between support 18 and a pivot 50 eccentrically
located on lower blade guard 44. Linkage bars 48 and
spring 51 keep lower blade guard 44 biased in position to
cover saw 24 whenever the saw is in its raised, rest
position. In the preferred embodiment, saw 24 is 10
inches (254 millimeters) in diameter, and all other parts
of the preferred embodiment are shown to scale in the
drawings.
Those skilled in the art will recognize that many
configurations of motorized miter boxes including changes
to base 10, turntable 14, motor drive arrangements, guard
arrangements, linkage arrangements, dimensions, and the
like may be used and that those shown in the drawings and
explained above are set forth by way of example only.
The cuttinghead handle 54 for guiding the
movement of saw 24 betTaeen the raised, rest position and
the lowered, operational position is adjustably coupled to
the cuttinghead apparatus so that the orientation of the
cuttinghead handle with respect to a user of the saw can
be adjusted by the user between a first position and a
second position. In the first position, which is
illustrated in Figure 5, cuttinghead handle 54 has a
preferred orientation for the user when the miter box is
located on a floor or at a similar elevation and the user
is kneeling or similarly located at floor level. In the
second position, illustrated in Figure 6, cuttinghead
handle 54 has a preferred orientation for the user when
the saw is located on a bench or similar elevated
structure and the user is standing or similarly located in
front of the saw.
In the preferred embodiment, the cuttinghead
handle apparatus comprises means for adjusting the
cuttinghead handle in an infinite number of positions
between the first and second positions illustrated. In
the embodiment shown, the apparatus for adjusting the
cuttinghead handle in an infinite number of positions
between the first and second positions comprises a bracket

5
56 located between cuttinghead handle 54 and the saw
apparatus. In the embodiment shown, bracket 56 is shown
attached to arm 20 via fasteners 58.
Referring now to Figures 5 and 6, in the
embodiment shown, bracket 56 defines two elongated
adjustments slots 60 through which adjustably secured
Fasteners 62 hold bracket 56 to cuttinghead handle 54.
Slots 60 are oriented so that, when adjustably secured
fasteners 62 are loosened, cuttinghead handle 54 can be
adjusted to an infinite number of positions between the
first and second positions shown in the figures and so
that, when adjustably secured fasteners 62 are tightened,
cuttinghead handle 54 is fixed in a position selected by
the user.
Still referring to Figures 5 and 6, the present
motorized miter box may be seen to comprise a carrying
handle 64 for use by a user in carrying the miter box
between work sites. As can be seen from the figures,
carrying handle 64 protrudes from the rear of base 10.
Carrying handle 64 comprises a support surface 66 located
in the same geometric plane as the lower surface 12 of
base 10 so that the carrying handle helps prevent the
miter box saw from tipping backward if the cuttinghead
apparatus is allowed to move freely from its lowered,
operational position to its upper,. at rest position.
In the preferred embodiment, carrying handle 64
comprises means for adjusting the lateral position of the
carrying handle between a storage position in which the
most rearward portion of the carrying handle is located in
relatively close proximity to base 10 and its second
carrying and anti-tipping position in which the most
rearward position of the carrying handle is located
relatively farther away from the base. In the embodiment
shown, carrying handle 64 is formed of rod stock, shaped
as desired with two handle extensions 68 which slidably
fit through apertures defined by base 10. Handle 64 is



6
prevented from pulling completely out of base 10 via pins
70.
The present inventions are to be limited only in
accordance with the scope of the appended claims, since
others skilled in the art may devise other embodiments
still within the limits of the claims.

Dessin représentatif